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10-28-2012, 03:36 PM
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Yeah, what we need to be prepared for is the Cascadia Subduction zone quake that happens every 200-500 years. The last one was in 1700 so the next one could happen tomorrow, or could happen 200 years from now. When that bad boy releases it's usually a 9.0 quake or bigger...Some other recent subduction quakes are the Japan quake and the Indian Ocean quake. That's "the big one" that's always talked about.

The reason these quakes are so big is because the size of the plates slipping (I believe). To give you an idea:

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